Reseating attachment



A. c. un-nilom. RESEATING ATTACHMENT. APPLICATION HILED JUNE 24, I920.

Patented Oct. 4, 1921.

a :3 a; u ff. 33 27 4% 26 JLz;

INVENTOR. m '0. 06%,

ATTORNEY.

reseating is e UNITED STATES THUR C. LIHDHOLM, OI SPRINGFIELD, MASSACHUSETTS.

mm'rms arracnnmwr.

Specification 01' Letters Patent.

Patented Oct. 4, 1921.

Application iiled June 24, 1920. Serial No. 891,878.

To all whom it may concern:

Be it known that I, ARTHUR C. Lmnnonu, a citizen of the United States of America, and a resident of S ringfield in the county of Hampden and tate of Massachusetts, have invented a new and useful Reseating Attachment, of which the following is a specification.

My invention relates to improvements 1n devices for reseating, recutting, or regrinding valve-seats in IIItGI'DEI-COmbHStIOII engines and the like, and consists essentially of a certain peculiar, portable, cuttlng element, which is adapted to have connected therewith and to drive a reseating or cutting tool or cutter, the power beingl applied through a flexible shaft to er wflzlrf means for attaching such sha to a fixed support and with driving means for said shaft, all as hereinafter set forth. I

As is well known, the valve-seats of internal-combustion engines and the like reguire reseating, recutting, or regrlnd ng rom time to tlme, and the primary ob ect of my invention is to provide a comparatively simple and inexpensive attachment wherewith such seat can be recut or reground expeditiously, conveniently, and accurately. The cuttlng element of thls attachment bein portable, the operation of anced to a degree not otherwise ossible.

' A urther object is to provide an attachment of this character which can be readily connected with any cated at a convenient point within range, through the medium of the flexible shaft employed as a part of said attachment, of the work to be done, that is, of the valveseats to be cut or reseated.

Other object and advantages Wlll appear in the course of the following description.

I attain the objects and secure the advantages of my invention by the means illustrated in the accompanying drawings, in which Figure 1 is a side elevation of a reseating attachment which embodies a practlcal form of my invention, the intermediate portion of the flexibleshaft bein broken out; Fig. 2, an end elevation o the bracket through the medium of which connection with the motor is made; Fig. 3, a horizontal section through the cutting element, the outer portions of the handles bemg broken off; Fig. 4, a vertical section through said motor that may be lo- Similar reference characters designate similar parts throughout the several views.

In Fig.1 an electric motor is represented at 1, and a bed-plate therefor at 2. These members may be part of a portable grindin machine, or of any other machine suitable for the pur ose or they alone may be especially provi ed for the purpose, but in an event should be located or capable of being located at a convenient distance from the work to be done. The motor-1 is provided' with a driving shaft 3 upon which is mounted a driving gear 5. The motor 1 is located adjacent to one edge of the bedplate 2 so as to present the gear 5 in convenient position for driving the revoluble members of the attachment. Such location is not im rative, however, inasmuch as certain of t e driving or driven members, or both, may be lengthened, or intermediate transmission members employed. A horizontal stud 6 is set in the bed-plate 2 and protrudes beyond one edge thereof, and said stud is secured in said bed-plate by means of a bolt 7 tapped into said plate over said stud. The stud. 6 is parallel with the motor shaft 3, and properly located relative thereto, as will hereinafter appear.

A bracket 8 has its base mounted on the protruding part of the stud 6, such base abutting the contiguous edge of the bedplate 2. The'a'foresaid base of. the bracket 8 is in the form of a split sleeve 9 having a pair of laterally-extending lug or ears 10 bored and tapped to receive a bolt 11. The sleeve 9 fits on to the stud 6, and the bolt 11 when tightened clamps the parts so that the bracket 8'is held immovably in place on said stud. The bracket 8 stands vertically, and is provided on top with a bearing 12 and a split sleeve 13. The sleeve 13 has a pair of upwardly-extending lugs or cars 14. A horizontal shaft 15 is journaled in the bearing 12, which latter is at the inner end of the top portion of the bracket 8, and secured on the inner, protruding terminal of said sllaft is a gear or pinion 16 which intermeshes with the motor gear 5.

A flexible shaft of ordinary construction,

entl comprising a non-rotar sheath 17, and a revoluble member l7 ig. 3), is employed in this attachment. One end of the flexibleshaft member 17 is attached to the shaft 15 in the usual manner or by any suitable means, while the corresponding end or terminal of the sheath 17 is inserted in the sleeve 13 and clamped therein by means of a bolt 18 which is inserted in the ears 14,

the latter, like the ears 10, being bored and tapped to receive said bolt. Thus it is seen that the revolving member 17 of the flexible shaft can be driven by the motor 1 through the medium of the gear 5, the pinion 16, and the shaft 15.

The opposite end or terminal of the flexible shaft is connected with the cutting element of the attachment in the manner presto be described.

T e aforesaid cutting element comprises a casing 19 having therein a horizontal chamber 20, and from which extend a rearward rojection 21 and a downward projection 22.

he casing 19 is provided on top with a removable cover 23 which may be secured in lace by means of screws or otherwise.

pon removing the cover 23 access is had to the chamber 20 and the parts and members therein. At the ends of the casing 19 are bosses or lugs 2424 into which are inserted the inner terminals of a pair of horizontal handles 25. The handles 25 are designed to be grasped in the hands when the cutting element is in use, that is to say, these handles are the members by means of which the cutting element is carried or moved about and handled or manipulated during the reseating operation.

Within the chamber 20 are an intermeshing worm 26 and a worm-wheel 27. The worm 26 is secured on a horizontal shaft 28 which is journaled in the left-hand end of the casing 19 and in the rearwardly-extending projection 21, bushings 29-29 being employed for said shaft at each end of said worm. The rear terminal portion of the shaft 26 is enlarged and has a socket 30 therein, as best shown in Fig. 5, of a shape and size to receive the inner end of a plug 31 which is rigidly attached to the end of the flexible-shaft member 17 that is connected with the cutting element, such plug being flattened on two sides in the usual manner. There is a split bushing 32 in the projection 21 back of the shaft 28, or behind the vertical plane of the rear, enlarged end of said shaft, and the flexible-shaft sheath 17 at this endis inserted in said bushing and clamped and secured tightly therein by means of two screws 33 which are ta ped 1nto the top of said projection and w en tightened compress and contract said bushin on said 'sheath. It is now clear that t e rotary motion of the flexible-shaft member 17 is imparted to the worm 26 through the medium of the plug 31 and the shaft 28. The worm 26, of course, drives the wormwheel 27.

The worm-wheel 27 is secured to the upper terminal of a spindle 34 which is journaled in the vertical projection 22, such projection extending upwardly into the chamber 20 beneath said worm-wheel to afiord a support for the same.' A nut 35 is pro vided on the upper end of the spindle 34 to retain the worm-wheel 27 in place or assist in so doing. The spindle 34 extends below the projection 22, and that portion of said spindle which protrudes from the bottom of said rojection is enlarged to form a socket 36 ig. 4:) for the reception of the upper terminal of a cutter spindle 37, and this enlarged part of said first-named spindle has in the sides thereof oppositely-disposed, bayonet-joint slots 38, to receive a bayonet-joint pin 39 which projects from opposite sides of said spindle'to enter said slots and engage or be enga ed by the innermost edges of the same. y means of this bayonet joint the spindle 37 is held in engagement with the spindle 34 and caused to revolve with said spindle, it being understood that the latter revolves to the left in the present instance.

A reseating tool, cutting implement, or cutter 40 is secured on the spindle 37 which latter extends below said cutter and is of a size to permit the same to pass down through the opening in the valve-seat that is to be cut.

In practice, assuming that the bracket 8 be in place on the stud 6, with the pinion'16 in engagement with the gear 5, the latter is set in motion, and the cutting element in the hands of the operator, who grasps the handles 25, is raised in position over the valve-seat to be cut or reseated, and the lower terminal of the spindle 37 is passed down through said valve-seat, until the cutter 40 comes into contact with said seat. The cutter, which meanwhile is revolving, being driven by means of the flexible shaft and the worm drive, is pressed downwardly on to the valve-seat, and quickly cuts the same to the required degree or extent. Then the cutting element is elevated to withdraw the cutter and its spindle 37 from the valveseat, and said element is taken away to be applied to another valve-seat, or to be laid aside, in which latter event the power is shut off. The reseating operation is rendered very simple by the means which I have provided, and is accomplished in the minimum amount of time, and with very little labor or efio'rt. The valve-seats are cut with the utmost accuracy by this means.

By employing a worm drive I obtain the necessary amount of power and the required degree of stability or uniformity in the driving and driven parts, and it 1s due to these factors which in turn are due to said worm drive that I am able to obtain the accuracy and other advantages that accrue from the use of my invention.

A washer 41 may be placed on the spindle 34: between the enlarged, lower terminal thereof and the bottom of the projection 22.

In Fig. 5 the extension 21 and the split bushing 32 are in cross section taken on line 42-42, Fig. 4.

The bracket terminal of the revoluble, flexible-shaft member 17 may be attached to the bracket shaft 15 in a manner similar to that in which the other terminal of said number is attached to the worm shaft 28.

With this attachment a valve can be ground in to-its seat, the valve then'being substituted for the cutter 40. I

The terms cutter and cutting as herein employed are intended respectively to include abrading members and the act of abrading.

More or less change in the shape, size, construction, and arrangement of some or all of the parts of my invention, as set forth in connection herewith, may be made, without departing from the spirit of said invention or exceeding the scope of what is claimed.

What I claim as m invention, and desire to secure by Letters atent, is-

' 1. In a reseating attachment, aportable cutting element comprising a casing having an extension, a worm and worm shaft journaled insaid casing, a flexible shaft, said worm shaft having a socket in one end .for the attachment thereto of one end of the revoluble memberof said flexible shaft, a split bushing in said extension to receive the corresponding end of the sheath of said flexible shaft, means to cause said bushing to bind on said sheath, and a worm-wheel and spindle therefor also journaled in said casing,

said worm-wheel intermeshing with said worm, and said spindle being adapted to have a cutter connected therewith.

2. In a reseating attachment, a portable cutting elementcomprising a casing having an extension, a worm and worm-shaft journaled in said casing, a flexible-shaft, said worm shaft having a socket in one end for the attachment thereto of one end of the revoluble member of said flexible shaft, a split bushing in said extension to receive the corresponding end of the sheath of said flexible shaft, means to cause said bushing to bind on said sheath, and a worm-wheel and spindle therefor also journaled in said casing, said worm-wheel intermeshing with said worm, and said spindle having a socket therein to receive a cutter spindle, and adapted to operatively engage said lastnamed spindle.

- 3. The combination, in a reseating attachment, with a fixed member, a bracket mounted on said member, a shaft journaled in said bracket, a pinion secured on said shaft, and a flexible shaft connected with said firstnamed shaft and mounted on said bracket, of a portable cutting element comprising a casing, a worm and worm shaft journaled in said casing, said flexible shaft being connected with said worm shaft and mounted on said casing, and a worm-wheel and spindle therefor also journaled in said casing,

said worm-wheel intermeshing with saidnaled in said bracket, a: pinion on said last- .named, shaft and intermeshing with said gear, a flexible shaft connected with said bracket shaft and mounted on said bracket,

a casing, a worm and w orm shaft journaled 1n sald casing, sa1d flexible shaft being connected with said worm shaft and mounted on said casing, and, a worm-wheel and spindle therefor also journaled in said casing, said spindle being adapted to have a cutter connected therewith.

5. The combination, in a reseating attachment,-with a support and a motor thereon, said motor having a driving member, ofv a bracket detachably connected with said support, a shaft journaled in said bracket and having a member to engage said driving member of said motor and being driven thereby, and a portable cutting element comprising a casing, a worm and worm shaft journaled in said casing, a flexible shaft operatively connected with said bracket shaft and with said worm shaft, and a wormwheePand spindle therefor also journaled in said casing, said worm-wheel intermeshing with said worm, and said spindle being adapted to have a cutter connected therewith.

ARTHUR o. LINDHOLM.

F. AICnmR, An'rmm A. BETH. 

